Finding the Fourth Proportional to 1,456,019.20, 2,009,276.16 and 811,436.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456,019.20 : 2,009,276.16 = 811,436.80 : x
2. Step 2: Convert to fraction form
   1,456,019.20/2,009,276.16 = 811,436.80/x
3. Step 3: Cross multiply
   1,456,019.20x = 2,009,276.16 × 811,436.80
4. Step 4: Simplify right side
   1,456,019.20x = 1,630,400,617,586.69
5. Step 5: Solve for x
   x = 1,630,400,617,586.69/1,456,019.20
6. Step 6: Final answer
   x = 1,119,765.88